A medical breathing probe

Abstract

The present invention belongs to the technical field of medical devices, and specifically, relates to a medical breathing probe, which includes a diaphragm, a diaphragm valve core, a first smooth airway guide block, a second smooth guide block, a valve body and a sampling device. The first smooth airway guide block and the second smooth guide block are arranged on both sides of the valve body. The diaphragm is installed on the valve seat of the valve body through the diaphragm valve core. The sampling device is higher than the main airway plane and is arranged above the first smooth airway guide block and the second smooth guide block. The diaphragm of the present invention can change the gap with pressure and flow, increase the mechanical structure of the diameter, the smooth airway reduces the local resistance scheme and the variable diameter (gap) wide linear interval precision detection, so as to realize high precision of small flow and large flow and large range continuous measurement. Since the detection airway turns and is in the same direction as the main air port, blind insertion installation can be realized.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a medical breathing probe. Background Art

[0002] Among the technical performance indicators of medical ventilators and respiratory anesthesia machines, flow detection accuracy and respiratory resistance are two crucial performance standards. It is directly related to the user experience of the product and the life safety of the patient. However, the traditional fixed-diameter medical respiratory probe has a small linear relationship range and large local resistance in the detection work, which becomes the main factor of detection and measurement error. Therefore, how to accurately measure the gas flow has become a key link in equipment manufacturing. Most of the related products on the market are fixed-diameter medical respiratory probes. At present, the medical respiratory probe detection method is to detect the pressure difference on both sides of the fixed-diameter diaphragm and calculate the flow rate. However, the fixed-diameter medical respiratory probe flow detection method has the following disadvantages: 1. Small linear range and large local respiratory resistance; 2. Poor measurement accuracy; 3. High processing difficulty; 4. It is not compatible with small flow high precision and large flow range measurement. Summary of the invention

[0003] In order to solve the above-mentioned deficiencies, the present invention provides a medical breathing probe.

[0004] The specific technical solutions of the present invention are as follows:

[0005] The medical breathing probe comprises a diaphragm, a diaphragm valve core, a first smooth airway guide block, a second smooth guide block, a valve body and a sampling device. The first smooth airway guide block and the second smooth guide block are arranged on both sides of the valve body. The diaphragm is installed on the valve seat of the valve body through the diaphragm valve core. The sampling device is higher than the main airway plane and is arranged above the first smooth airway guide block and the second smooth guide block.

[0006] The diaphragm includes a swinging part, a connecting part and a fixed part. The swinging part is connected to one end of the connecting part, and the other end of the connecting part is connected to the fixed part. The connecting part has a slender structure, and the end of the swinging part away from the connecting part has an arc structure.

[0007] The valve body vertically extends an arched piece from the end away from the valve seat to the end of the swing portion away from the connecting portion, and the arched end of the arched piece matches the curvature of the end of the swing portion away from the connecting portion.

[0008] Preferably, concave cutouts are provided along both sides of the connecting portion near the end of the swing portion.

[0009] Preferably, the diaphragm is made of corrosion-resistant material.

[0010] Preferably, the fixing portion of the diaphragm is fixed on the valve seat of the valve body by means of a valve core and a pressure block via screws.

[0011] Preferably, the first smooth airway guide block and the second smooth guide block are both U-shaped curved surface structures.

[0012] Preferably, the sampling device includes a first sampling channel and a second sampling channel; the first sampling channel includes a first gas path and a second gas path, one end of the first gas path and one end of the second gas path are vertically connected, the first gas path is arranged above the first smooth gas path guide block, and the second gas path is arranged in the same direction as the main gas path; the second sampling channel includes a third gas path and a fourth gas path, the third gas path and the fourth gas path are connected, the third gas path is arranged above the second smooth gas path guide block, and the fourth gas path is arranged in the same direction as the main gas path.

[0013] Preferably, a silicone sealing component is provided at the connection between the third gas circuit and the fourth gas circuit, and a turning mechanism is provided inside the silicone component for turning the gas circuit parallel to the main gas circuit.

[0014] Preferably, the other end of the second gas circuit is sealed with a double-lip seal of a silicone sealing component, and the end of the fourth gas circuit away from the third gas circuit is sealed with a double-lip seal of a silicone sealing component.

[0015] Preferably, the medical breathing probe further comprises a protective net, which is arranged in the main air inlet and outlet valve block.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] The diaphragm of the present invention can change the gap with pressure and flow, increase the mechanical structure of the diameter, smooth the airway to reduce local resistance and variable diameter (gap) wide linear range precision detection, to achieve high precision for small flow and large range continuous measurement for large flow. Since the detection airway is turned in the same direction as the main vent, blind insertion installation can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the medical breathing probe of the present invention;

[0019] Figure 2 The present invention Figure 1 Schematic diagram of the cross section of AA;

[0020] Figure 3 Schematic diagram of the protective net of the medical breathing probe of the present invention;

[0021] Figure 4 is a top view of the medical breathing probe of the present invention;

[0022] Figure 5 The present invention Figure 4 BB cross-sectional diagram;

[0023] Figure 6is a cross-sectional schematic diagram of a first sampling channel of a breathing probe of the present invention;

[0024] Figure 7 is a cross-sectional schematic diagram of a second sampling channel of the breathing probe of the present invention;

[0025] Figure 8 It is a perspective view of the turning mechanism provided in the silicone assembly of the breathing probe of the present invention;

[0026] Fig. 9 It is a schematic diagram of the framework of the medical breathing probe of the present invention;

[0027] Reference numerals:

[0028] 1. Diaphragm, 2. Swinging part, 3. Connecting part, 4. Fixed part, 5. Concave incision, 6. Valve body, 7. Arched part, 8. First smooth airway guide block, 9. Second smooth airway guide block, 10. Sampling device, 11. First sampling channel, 12. First air path, 13. Second air path, 14. Second sampling channel, 15. Third air path, 16. Fourth air path, 17. First screw, 18. Second screw, 19. Main air path, 20. Protective net, 21. Silicone sealing assembly, 22. Ventilation valve body one, 23. Ventilation valve body two, 24. Detection air hole, 25. First detection air hole, 26. Second detection air hole. DETAILED DESCRIPTION

[0029] The present invention will now be further described with reference to the accompanying drawings.

[0030] The present invention provides a medical breathing probe, which adopts a variable gap diaphragm 1 and a smooth airway detection scheme, and specifically designs a group of diaphragm valve cores with variable gaps through swan neck bending. The diaphragm 1 is designed to bend the swan neck to increase the measurement accuracy. The structure diagram of the variable path medical breathing probe is shown in FIG. Figure 1-9 As shown, the medical breathing probe is composed of a plurality of metal valve blocks and silicone seals. The function of the metal valve block is to fix the airway and the diaphragm valve core together. The medical breathing probe includes a diaphragm 1, a diaphragm valve core, a first smooth airway guide block 8, a second smooth airway guide block 9, a valve body 6 and a sampling device 10. The first smooth airway guide block 8 and the second smooth airway guide block 9 are arranged on both sides of the valve body 6. The first smooth airway guide block 8 and the second smooth airway guide block 9 are both U-shaped curved surface structures. Among them, the end of the valve body 6 away from the valve seat can be an arched structure.

[0031] The diaphragm 1 is installed on the valve seat of the valve body 6 through the diaphragm valve core. The diaphragm includes a swinging part 2, a connecting part 3 and a fixed part 4. The swinging part 2 is connected to one end of the connecting part 3, and the other end of the connecting part 3 is connected to the fixed part 4. The structure of the connecting part 3 is a slender structure. The end of the swinging part 2 away from the connecting part is an arc structure. The valve body 6 extends an arched part 7 vertically to the end of the swinging part 2 away from the connecting part away from the valve seat. The arched end of the arched part 7 matches the arc of the end of the swinging part 2 away from the connecting part. The swinging part 2 is close to the connecting part and a concave cutout 5 is set along both sides of the connecting part. The fixed part 4 of the diaphragm 1 is fixed to the valve seat of the valve body by a valve core and a pressure block through a first screw 17 and a second screw 18. The diaphragm can be easily replaced, the diaphragm is firmly fixed, and the life of the diaphragm is increased. The diaphragm 1 adopts a thin neck bending design of corrosion-resistant materials, which is more sensitive to flow changes, thereby increasing the detection accuracy. The diaphragm 1 has a detection gap with the arched part. And the diaphragm 1 is assembled and fixed by two clamping plates to facilitate the consistency of probe assembly.

[0032] The connecting portion 3 of the diaphragm 1 is a thin neck structure, and the diaphragm is bent under force to cause the diameter to change. When the flow rate is small, the diaphragm initially produces a slight bend, the diameter is small, and the detection accuracy is high. In the process of increasing flow and pressure, the diaphragm continues to bend, which plays a role in increasing the diameter and can be compatible with a larger measurement range. At the same time, due to the bending of the diaphragm, the diameter becomes larger and the local resistance is greatly reduced, which plays a key role in improving the measurement accuracy and range.

[0033] The sampling device 10 is higher than the main air path plane and is arranged above the first smooth airway guide block 8 and the second smooth airway guide block 9, wherein the sampling device 10 includes a first sampling channel 11 and a second sampling channel 14; the first sampling channel 11 includes a first air path 12 and a second air path 13, one end of the first air path 12 and one end of the second air path 13 are vertically connected, the first air path 12 is arranged above the first smooth airway guide block 8, and the second air path 13 is arranged in the same direction as the main air path; the second sampling channel 14 includes a third air path 15 and a fourth air path 16, the third air path 15 and the fourth air path 16 are connected, the third air path 15 is arranged above the second smooth airway guide block 9, and the fourth air path 16 is arranged in the same direction as the main air path.

[0034] A silicone seal assembly 21 is provided at the connection between the third gas path 15 and the fourth gas path 16. The silicone seal assembly 21 has a turning mechanism inside for gas path turning and is parallel to the main gas path 19. The other end of the second gas path 13 is sealed with a double lip of the silicone seal assembly, and the fourth gas path 16 away from the third gas path 15 is sealed with a double lip of the silicone seal assembly.

[0035] The silicone seal of the present invention has the following functions: first, to reduce the leakage of the detection gas; second, to change the direction of the sampling airway from perpendicular to the main airway to parallel to the main airway 19; and third, to design a double-lip seal and blindly insert the detection pipeline, with good sealing effect.

[0036] The medical respiratory probe also includes a protective net 20, which is arranged in the main air inlet and outlet valve block, connected by threads, and a closed space is formed in the middle by a silicone gasket and a groove. The main airway is designed with a protective net 20 to prevent foreign objects from damaging the diaphragm. When the gas flows in from the air inlet, it passes through the smooth metal air guide, the diaphragm valve core and the diaphragm 1 to the air outlet. Since there are airway guide blocks on both sides, the local resistance can be reduced, and the resistance is further reduced due to the variable gap of the diaphragm. When a small flow enters the probe, the diameter is small and the measurement accuracy is high; when a large flow passes through the probe, the diaphragm bends moderately, the diameter becomes larger, and a larger range can be measured. When the pressure difference is detected by the inlet and outlet detection interface, the flow change can be sensitively detected according to the pressure value and the pressure difference, while reducing the effect of respiratory resistance. This structure changes the direction of the bilateral gas paths to be detected. The sampling device 10 is higher than the main airway by a certain height, which changes the setting position of the sampling point, reduces the influence of turbulence in the sampling area, and improves the sampling and detection accuracy. The silicone seal detection port and the tube adopt double-lip sealing, which can realize blind insertion installation of the equipment and greatly improve the assembly efficiency.

[0037] The medical breathing probe includes a ventilation valve body 22 and a ventilation valve body 23, and the ventilation valve body 22 and the ventilation valve body 23 are connected. The ventilation valve body 22 and the ventilation valve body 23 are both hollow structures. The hollow structure of the ventilation valve body 22 is the main airway 19, and the ventilation valve body 23 is used to set the valve body 6, the first smooth airway guide block 8, the second smooth airway guide block 9, the sampling device 10, the silicone sealing component 21 and other related accessories. In addition, the ventilation valve body 2 is provided with a detection hole 24, and the detection hole includes a first detection hole 25 and a second detection hole 26. The first detection hole 25 is the outlet end of the second air path 13, and the second detection hole 26 is the outlet end of the fourth air path 16.

[0038] Any contents not described in detail in the present invention can be based on the conventional technical knowledge in the art.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A medical breathing probe, comprising a diaphragm, a diaphragm valve core, a first smooth airway guide block, a second smooth guide block, a valve body and a sampling device, characterized in that: The first smooth airway guide block and the second smooth guide block are arranged on both sides of the valve body, the diaphragm is installed on the valve seat of the valve body through the diaphragm valve core, the sampling device is higher than the main airway plane, and is arranged above the first smooth airway guide block and the second smooth guide block, wherein, The diaphragm includes a swinging part, a connecting part and a fixed part. The swinging part is connected to one end of the connecting part, and the other end of the connecting part is connected to the fixed part. The connecting part has a slender structure, and the end of the swinging part away from the connecting part has an arc structure. The valve body extends vertically from an arched piece at the end away from the valve seat to the end of the swing portion away from the connecting portion, and the arched end of the arched piece matches the curvature of the end of the swing portion away from the connecting portion; The diaphragm adopts a thin neck bending design; there is a detection gap between the diaphragm and the arched piece; and the diaphragm is assembled and fixed by two clamping plates; The sampling device comprises a first sampling channel and a second sampling channel; the first sampling channel comprises a first gas path and a second gas path, one end of the first gas path and one end of the second gas path are vertically connected, the first gas path is arranged above the first smooth gas path guide block, and the second gas path is arranged in the same direction as the main gas path; the second sampling channel comprises a third gas path and a fourth gas path, the third gas path and the fourth gas path are connected, the third gas path is arranged above the second smooth gas path guide block, and the fourth gas path is arranged in the same direction as the main gas path; The other end of the second gas circuit is sealed with a double lip of a silicone sealing component, and the end of the fourth gas circuit away from the third gas circuit is sealed with a double lip of a silicone sealing component.

2. The medical respiratory probe according to claim 1, characterized in that: The swing portion is provided with concave cutouts along both sides of the connecting portion near the end of the connecting portion.

3. The medical respiratory probe according to claim 1, characterized in that: The diaphragm is made of corrosion-resistant material.

4. The medical respiratory probe according to claim 1, characterized in that: The fixing part of the diaphragm is fixed on the valve seat of the valve body by means of a valve core and a pressure block through screws.

5. The medical respiratory probe according to claim 1, characterized in that: The first smooth airway guide block and the second smooth guide block both have U-shaped curved surface structures.

6. The medical respiratory probe according to claim 1, characterized in that: A silicone seal assembly is provided at the connection between the third gas circuit and the fourth gas circuit. A turning mechanism is provided inside the silicone seal assembly for turning the gas circuit and is parallel to the main gas circuit.

7. The medical respiratory probe according to claim 1, characterized in that: The medical breathing probe further comprises a protective net, which is arranged in the main air inlet and outlet valve block.

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